This is the Venom Power 3S Li-Poly 20C 4000mAh Battery Pack with Traxxas Connector. Designed to compliment today's demand for big power and high capacity. The pre-installed Traxxas High Current Connector makes this battery an excellent choice for the Traxxas Velineon Brushless Power System.

Features:

30% or more average run time.

33% lighter than the comparable NiMH pack.

Unique top/end power lead location allows for fitment in a wide range of chassis platforms.